Differentiating Ambiguity: A Comment
AbstractIn Ghirardato, Macheroni and MArcinaccri (GMM) propose a method for distinguishing between percieved ambiguity and the decision-maker's reaction to it. They study a general class of preferences which includes CEU and a-MEU and axiomatise a subclass of a-MEU preferences. We show that for Hurwicz preferences the proposed measure of ambiguity depends on parameters which intuitively reflect ambiguity-attitude. Furthermore, any a-MEU preferences which satisfy the CEU axioms, satisfy GMM's axioms if and only if a = 0 or 1, that is, the capacity must be convex or concave.
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Bibliographic InfoPaper provided by Exeter University, Department of Economics in its series Discussion Papers with number 0606.
Date of creation: 2006
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Ambiguity; multiple priors; Hurwicz; Choquet expected utility.;
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- Jürgen Eichberger & Simon Grant & David Kelsey, 2008. "Differentiating ambiguity: an expository note," Economic Theory, Springer, vol. 36(2), pages 327-336, August.
- Ani Guerdjikova & Jürgen Eichberger, 2012. "Ambiguity, Data and Preferences for Information - A Case-Based Approach," THEMA Working Papers 2012-45 Classification-Je, THEMA (THéorie Economique, Modélisation et Applications), Université de Cergy-Pontoise.
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